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A241323
Number of nX2 0..3 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..3 introduced in row major order
1
1, 8, 85, 1030, 13011, 165924, 2121033, 27129985, 347071157, 4440219758, 56806066313, 726751710350, 9297746189765, 118951351657555, 1521812314158867, 19469410910818078, 249083253366686135, 3186663809907191548
OFFSET
1,2
COMMENTS
Column 2 of A241328
LINKS
FORMULA
Empirical: a(n) = 17*a(n-1) -57*a(n-2) +43*a(n-3) -37*a(n-4) +109*a(n-5) -62*a(n-6) -48*a(n-8) +36*a(n-9) for n>10
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..0..2....2..1....2..2....1..1....2..3....0..2....2..1....2..1....2..1....1..1
..1..0....1..3....2..2....1..1....3..1....2..3....3..0....0..3....2..1....1..2
..3..0....1..2....0..2....1..2....2..1....0..2....2..3....0..3....2..3....0..2
CROSSREFS
Sequence in context: A093103 A288691 A300675 * A349334 A261501 A371897
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 19 2014
STATUS
approved